Why do they exercise?

I am finding that I LOVE everything Boynton for my infant son. They are goofy enough for me to laugh at every time and entertaining for him. The size of the book is especially nice, as he can hold it, chew on it, turn pages himself, carry it around, etc.My only question, why do the critters go up and...Per saperne di più…

I am finding that I LOVE everything Boynton for my infant son. They are goofy enough for me to laugh at every time and entertaining for him. The size of the book is especially nice, as he can hold it, chew on it, turn pages himself, carry it around, etc.My only question, why do the critters go up and exercise after brushing their teeth? I laugh at it, but it's not exactly a normal bedtime routine.